You never know when Poser will strike--veinglory
Charles Stross wrote 'Saturn's Children', a widely acclaimed sci fi story of an adventurous femmebot. Here is the UK cover:

An American edition is coming this July. It will look like this:

Is this a case of 'no sex please, we're British'? Or just dumbing down on the assumption that, never mind the plot, cleavage sells?